Apparatus for removing superfluous bronze.



PATENTED DEC. 25, 1906.

No. 839,704. A

I E. 0. BENNETT. APPARATUS FOR REMOVING SUPERFLUOUS BRONZE? APPLICATION FILED MAB. 22,1906.

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II TED STATES PATENT OFFICE.-

EDIVARD O. BENNETT, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO ILLINOIS PACIFIC GLASS COMPANY, OF SAN FRAN- CISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA.

APPARATUS FOR REMOVING SUPERFLUOUS BRONZE.

N 0. 839,704. Specification of Letters Patent. Patented Dec. 25, 1906. Application filed March 22,1906. Serial No. 307,422.

To all whom it may concern: construction and the combination of parts, Be it known that I, EDWARD O. BENNETT, I as hereinafter more fully described and a citizen of the United States, residing in the I claimed, having reference to the accompany- 5 city and county of San Francisco and State I ing drawings, in which- 5 of California, have invented new and useful Figure 1 is a sectional view of a well-known Improvements in Apparatus for Removing type of bronzing-machine to which my inven- Superfluous Bronze, of which the following is tlon has been applied. Fig. 2 is a plan view a specification. of the same. My invention relates to bronzing-machines, Referring to the drawings, A represents 1c and especially pertains to a pneumatic applil the frame of a well-known type of bronzingance for removing superfluous bronze. machine, as seen, for example, in Patent No.

It is common in the printers art in bronz- I 613,412, November 1, 1898. This machine ing paper and the like, to apply a size first to I has the usual rotary cylinder or paper-carthe article to be bronzed; then to pass the rier 2, feed-table 3, grippers 3, bronze-feed I5 sized article through a so-called bronzingl hopper 4, distributing-rollers 5, rotary buffmachine to apply and set the bronze and to ing and bronzing pads 6, dusting-rollers 8 9 remove some of the superfluous bronze; the 10, casing 11, with hinged doors 12 12 for final operation is the passage of the bronzed the bronzing and dusting mechanisms, re article again through the machine (the feed spective horizontal partitions 13 14 between 20 of bronze having been discontinued and the rollers 89, 9 10, brushes 15, strippers 16, and

deposits of bronze in the machine removed) discharge 16. Rollers 8 9 revolve in a reto remove the balance of superfluous bronze. verse direction to cylinder 2 and operate to The main object of my invention is to do remove the major portion of the excess 7 away with the necessity of thus having to bronze from the paper. Roller 10 revolves 25 pass the paper through the machine a second with the cylinder and 1s 1n the nature of a time and to bronze the paper and remove all cleansing-roller. The dust raised by the the superfluous bronze from the paper, from rollers is deposited (such as does not escape the machine, and from the room at one opinto the room) within the machine and'is reeration. moved therefrom generally by mechanical 30 The present method is objectionable in means.

other ways besides that of having to handle My invention may be said to comprehend the paper so many times. Although the the exhausting by steady and regulated flow, bronzing and bronze-removing mechanisms the air that may come in contact with the are carefully incased, the bronze-powder is in bronzed surface of the material While the 3 5 the nature ofavery fine impalpable dust that same is passing through the machine, and sifts out through various cracks and crevices thus carry ofl all dust whatsoever removed and goes floating through the air to be defrom the paper by the dusting brushes or posited all over the printing-shop to the rolls. In accomplishing this it is very essengreat annoyance and discomfort of the emtial that very little draft or irregular air-cur- 4o ployees, damage to stock, &c. Besides, those rents be produced, as the same greatly interwho are working immediately over the maferes with the feeding and handling of the chines are required to use sponges or other paper. In order to obtain these results, I respiratory apparatus to exclude the poisonpreferably employ air-conductors of pecul- 5 ous dust from their lungs. iar construction and connect the same to A great amount of money and much the different compartments containing the thought have been expended in endeavoring f bronzeapplying and dusting attachments of to overcome the various objections above I the machine so that the flow of air may be noted; but with many years experience I l regulated to suit the different positions the I00 have yet to know of means other than that l paper may be in as it passes through the mavwhich I am about to describe which have i chine. Forinstance, the current of air should )roven successful. be very light or simply stron enough to My invention consists of the parts and the carry off the finest particles whiIe the bronze is being applied, then much stronger as the dusting or rubbing off is being done, and,

finally, the air-currrents should be very much reduced again after the grippers on the carrier release the paper, else the delivery and carrying away of the paper will be more or less seriously interfered with. If too strong a suction is exerted in the earlier stages of the bronzing process, the bronze is likely to be disturbed on the paper before it has had ample time to set and will result in smudging the paper and. rendering the work Streaky.

In carrying out my invention I employ suction apparatus of suitable construction as, for example, the fan 17, which may be operated by any appropriate means, as the motor 18. This fan has an induction-trunk 19, connected with the interior of the casing 11, and an eduction-trunk 20, which is adapted to connect with any suitable chamber or means for collecting the dust sucked up by the fan. The lower end of the trunk 19 hasa removable section 19, which latter has separatelyvalved branches respective compartments in which the dusting-brushes are located, and the parts are arranged and connected in such fashion as to permit ready access to any of saidcompartments.

As here shown, the partitions 13 14 divide the casing into three compartments 21 22 28. Manifestly there could be more partitions and more compartments, in which case there would be more branches leading to trunk 19. The trunk-section 19 has a branch 24, connecting with the upper compartment 21., a second branch 25, connecting with the compartment 22, and a third branch 26, connecting with the lowermost compartment 23. The door 12*, which gives access to all of the compartments 21 22 23, is shown as hinged at 12 and as comprising two plates standing in diflerent planes and connected rigidly to gether by the branches 24 25 26 and trunksection 19. When door 12 is opened, all of said parts drop down as a unitary structure. When the door is closed and locked, the abutting ends of the trunk 19 and 19 are brought together in tight joint and locked by suitable means, as indicated at 27. The door plates also fit snug and dust proof around the edges of 'the compartments and are held tight by suitable means, as the camhooks 28. The bottom of the section 19 is provided with a gate or valve 19, by which the dust deposits in the section may be with drawn from time to time. Ordinarily valve 19 would be closed, so that the circulation of air takes place only through the branches 24 25 26. Each branch 24 25 26 is provided with a suitable valve 29, by which the aircurrents passing through the several branches may be separately controlled or regulated and the force of the suction in the connecting with the several chambers 21 22 23 varied and regulated to suit requirements and for the rea sons hereinbefore enumerated.

In order to prevent air being drawn in around the edges of the paper on the cylinder, I provide a suitable opening or openings 30 in the bottom of the lower compartment 23, through which suflicient air for that compastment is admitted, and so avoid any suction on the discharge end of the sheet. The air entering at 30 circulates around back of roller 10 and around the edges of the partitions 14 13 proximate to the bronze-surface of the paper. By thus admitting a suitable quantity of air into the casing and in a suitable manner and by properly controlling the suction through the several branches 26 25 24 I am able, as has been amply demonstrated in practice, to effectually remove in one operation all of the superfluous bronze from the paper and from the machine and at the same time prevent escape of dust from the machine and the consequent contamination of the outside air.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a bronzing-machine, the combination with a paper-carrier, bronzing mechanism and bronze-removing mechanism, of a casing for said bronze-removing mechanism, said casing divided into a plurality of compartments, air-conducting pipes leading from the several compartments, means for creating a suction in said pipes, and means for controlling the force of the suction in the several pipes.

2. A bronzing-machine having paper-carrying means, bronze-applying, bronze-removing and dusting compartments, respective bronze-applying, bronze-removing and dusting means in said compartments, hinged closures for said compartments, separate airpipes connected with said closures and communicating with respective compartments, means for creating a suction in said air-pipes, and means for varying the force of the suction through said several pipes.

3. In a bronzing-machine, the combination of a sheet-carrier, bronze-applying means, superfluous bronze-removing means, means for delivering the paper from the car rier, a casing having a plurality of compartments housing said bronze-applying and superfluous-bronze-removing means, and means for creating a suction in said compartment to remove the superfluous bronze, and means for modifying the suction at the beginning and ending of the bronzing process.

4. In a bronzing-machine, the combination of a sheet-carrier, an incased mechanism for applying bronze to the sheet, said mechanism operative to apply the bronze and to remove the superfluous bronze from the sheet prior to the delivery of the latter from the carrier, an air-induction mechanism to In testimony whereof I have hereunto set carry away from the casing the bronze remy hand in presence of two subscribing Wit- 1o moged froni the sheet, ]and means to cause nesses. sai air-inc uction mec anism to exert a 5 lighter suction on the paper during the appli- EDWVARD BENNETT cation of the bronze and during the period Witnesses: immediately preceding discharge from the D. B. RICHARDS, carrier than during the intermediate period. WM. J. GORMAN. 

